• View all Rainguard Brands
  • Micro-Seal® Densifier LS

    Deep penetrating Technology
    Converts calcium hydroxide to calcium hydrate, creates a harder surface and longer lasting performance.

    Natural Finish
    Breathable and will never crack, peel and will not yellow.

    Safe to use
    Can be applied anywhere in North America because it contains low VOCs, no carcinogens, no odor. Does not generate hazardous wastewater.

    Easy to apply
    One coat application. Warranty up to 1 year.

    Micro-Seal® Densifier LS

    Micro-Seal® Lithium Silicate (Micro-Seal® LS) is much easier to use than sodium or potassium silicates and does not generate hazardous wastewater. It is a high-quality densifier, hardener, and sealer for concrete surfaces. The lithium silicate penetrates deeper than potassium and sodium silicates and is much less likely to blush. The harder surface makes cleaning easier and provides a dustproof finish for easier surface maintenance. Micro-Seal® LS will not contribute to surface Alkali Silicate Reaction (ASR).

    Note to Specifier – CSI Reference Codes

    Best Tools for Application

    Small Surfaces
    A foam brush is recommended to soak in and saturate your substrate.

    Medium Surfaces
    Use a small hand pump sprayer.

    Large Surfaces
    Use an airless sprayer with a spray tip size between .035mm to .051mm.

    Application Best Practices

    1) Step One: Prepare the surface and confirm surface moisture is less than 25%. Remove dirt, grime, efflorescence, lime run, construction debris, form oils and release agents, chalked materials, loose and peeling paint, mold, mildew, etc. All cracks should be pointed or caulked.
    2) Step Two: Perform a test application to confirm fit and finish.
    3) Step Three: Apply the product according to It’s TDS.
    4) Step Four: Let cure.
    5) Step Five: Perform post application test to assure results are achieved.

    Benefits of Concentrates and How to Mix

    The benefits of specifying Concentrates:

    • Reduces carbon footprint
    • Reduces job site and landfill waste
    • Reduces worker and supply chain fatigue
    1. Refer to the description on the packaging for dilution ratios.
    2. Pour contents of concentrate into an empty container. The container size should be the size of the finished amount of product.
    3. Fill the container with clean water – we recommend distilled water for best results.
    4. Mix lightly with a stir stick.

    Specification and Ordering Options


    Substrate Uses and Anticipated Coverage Rates

    Substrate porosity varies due to type of substrate and/or the age of the surface and its exposure to weathering. As a result, coverage rates may also vary. In addition, in certain applications, two coats may be required. Please contact us for coverage estimates. Best practices are to first perform a test application on the substrate, followed by a rilem tube test to ensure adequate coverage/absorption.

    Refer to the product TDS for Surface Preparation and Application Methods.

    Need help? Call 1-888-765-7070 Option 2.

    Coverage Rates (Theoretical)

    Substrate Sq Ft / Gallon # Of Coats*
    Uncured Concrete 700-900 1
    Polished Concrete 500-800 1

    Testing Data and Product Characteristics

    Test Data

    ASTM F 1869 Water Vapor Transmission Rate 10.00 lbs/ 2,000 sqft/ 24 hours,35.4% Improvement over untreated control specimens
    ASTM C-642 Water Absorption After 48 hour immersion, 20.9% improvement over untreated control specimens

    Product Characteristics

    Material Lithium Silicate
    Active Content 15%
    Volume Solids 8%
    Color of Material Colorless
    Odor No Odor
    V.O.C. 0 g/L V.O.C. Compliant
    Flash Point Non-Flammable
    pH Value 11
    Weight Approximately 9.2 lbs./Gal.
    Surface Dry/Recoat/Usable Approximately 1 Hour

    Approvals, Qualifications and Associations

    Call 1-888-765-7070 Option 2 for additional assistance.

    LAUSD – OESH Approved
    LEED Points Up to 3 Points
    LEED (New Construction) Available
    LEED (New Schools/CHPS) Available
    CARB Compliant
    SCAQMD Compliant
    All Other States and Canada Compliant
    FDA Meets Requirements
    USGBC Member
    APTA Member
    HPD Various Products Approved
    American Institute of Architecture Two Approved CE courses

    Data Sheets & Other Document Download

    We’re Here to Help!

    Call 888-765-7070